Cell Differentiation/drug effects; Dendritic Cells/drug effects; Interferon-beta/pharmacology; Interleukin-17/immunology; Multiple Sclerosis/immunology; T-Lymphocytes, Helper-Inducer/drug effects; CD4-Positive T-Lymphocytes/drug effects; CD4-Positive T-Lymphocytes/immunology; Cell Differentiation/immunology; Cells, Cultured; Dendritic Cells/immunology; Down-Regulation/drug effects; Down-Regulation/immunology; Humans; Interferon beta-1a; Interleukin-10/agonists; Interleukin-10/immunology; Interleukin-10/metabolism; Interleukin-12 Subunit p35/agonists; Interleukin-12 Subunit p35/immunology; Interleukin-12 Subunit p35/metabolism; Interleukin-1beta/antagonists & inhibitors; Interleukin-1beta/immunology; Interleukin-1beta/metabolism; Interleukin-23 Subunit p19/antagonists & inhibitors; Interleukin-23 Subunit p19/immunology; Interleukin-23 Subunit p19/metabolism; Nuclear Receptor Subfamily 1, Group F, Member 3; Phosphorylation/drug effects; Phosphorylation/immunology; Receptors, CCR6/antagonists & inhibitors; Receptors, CCR6/immunology; Receptors, CCR6/metabolism; Receptors, Interleukin/antagonists & inhibitors; Receptors, Interleukin/immunology; Receptors, Interleukin/metabolism; Receptors, Retinoic Acid/immunology; Receptors, Retinoic Acid/metabolism; Receptors, Thyroid Hormone/immunology; Receptors, Thyroid Hormone/metabolism; STAT1 Transcription Factor/drug effects; STAT1 Transcription Factor/immunology; STAT1 Transcription Factor/metabolism; STAT3 Transcription Factor/drug effects; STAT3 Transcription Factor/immunology; STAT3 Transcription Factor/metabolism; T-Lymphocytes, Helper-Inducer/immunology; Up-Regulation/drug effects; Up-Regulation/immunology